Pen



FIG. 1 is a front perspective view of a first embodiment of a pen, showing my new design;

FIG. 2 is a rear perspective view thereof;

FIG. 3 is a rear elevation view thereof;

FIG. 4 is an elevation view thereof from the left side, the right side being a mirror image thereof;

FIG. 5 is a front elevational view thereof;

FIG. 6 is a top plan view thereof;

FIG. 7 is a bottom plan view thereof;

FIG. 8 is a front perspective view of a second embodiment of the pen shown in FIG. 1;

FIG. 9 is a rear perspective view thereof;

FIG. 10 is a rear elevational view thereof;

FIG. 11 is a left side elevational view, the right side being a mirror image thereof;

FIG. 12 is a front elevation view thereof;

FIG. 13 is a top plan view thereof; and,

FIG. 14 is a bottom plan view thereof. 

The ornamental design for a pen, as shown and described. 